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visits member for 2 years, 2 months
seen Aug 12 at 17:11

I was born to answer lhfs.


Jun
1
comment Why dividing by zero still works
@DavidDyer Remainder and factor theorem: I am just in 9th grade.
Jun
1
accepted Why dividing by zero still works
Jun
1
comment Why dividing by zero still works
@J.M. Surprisingly, that is exactly what he also said.
Jun
1
comment Why dividing by zero still works
Oh, that makes sense. Thanks!
Jun
1
asked Why dividing by zero still works
May
27
awarded  Notable Question
May
26
comment Proving that either $2^n-1 $ or $ 2^n+1$ is not prime
Why are you not using \rm for variables today?
May
26
comment How to prove $\sum\limits_{n=1}^{\infty}\frac{\sin n}n=\frac{\pi-1}{2}$
That, my friend, is an epic observation. :-)
May
26
accepted What is $-i$ exactly?
May
25
comment Algebra Equation with equals on left hand side
@amWhy Just saying, but some people who have started with algebra-precalculus may not understand what a relation is, let alone a symmetric relation. I think you should include a link which explains equivalence in classical logic as well as relations. Thanks :-)
May
24
comment How do you define definition symbol :=?
:= := :=, if you know what I mean. ;-)
May
24
comment What is $-i$ exactly?
@AdrianPetrescu but 1 does have a sign, which is +, so we can use - to negate it. Here, I first focus on how -i cannot exist and then I say that even if it does, what differences are there between the two?
May
23
comment How to show $x^4 - 1296 = (x^3-6x^2+36x-216)(x+6)$
I agree. :-) ${}$
May
23
comment How to show $x^4 - 1296 = (x^3-6x^2+36x-216)(x+6)$
(Mostly known as the synthetic division.)
May
23
comment How to show $x^4 - 1296 = (x^3-6x^2+36x-216)(x+6)$
Uh, actually I am saying that you wrote $a^4 - b^4 = a^3 + a^2 b + ab^2 + b^3$. It should be $a^4 - b^4 = (a - b)(a^3 + a^2 b + ab^2 + b^3)$
May
23
comment How to show $x^4 - 1296 = (x^3-6x^2+36x-216)(x+6)$
$a^4 - b^4 = (a - b)(a^3 + a^2 b + ab^2 + b^3)$...
May
23
comment How to show $x^4 - 1296 = (x^3-6x^2+36x-216)(x+6)$
Note that the factorization is easily derivable by the Factor Theorem.
May
23
answered How to show $x^4 - 1296 = (x^3-6x^2+36x-216)(x+6)$
May
22
comment Choice of numbers in calculating $\lim_{x\rightarrow 0}\frac{e^{2x}-1}{\sin 3x}$
I think what lab said suffices.
May
21
awarded  Good Question